Quick-firing gun.



PATBNTED MAY 26, 190s.

asuma-SHEET 1.

H. oTTo. QUIGK PIRING GUN. APPLIUATION FILED DBO. 17, 1907'.

i Y PATENTED MAY 26, 1908.

H. OTTO.

QUICK FIRING GUN.

APPLICATION FILED DEO. 17I 1907. 3 SHEETS-SHEET 2.

| s nl I E wrl tgl; x o v l w l' wnNEssEs N E .lNvENTon ATNTED 'MAY 2e, 190s.

H. OTTO.

QUICK PIRING GUN. APPLICATION FILED 1320.17, 1907.

3 SHEETS-SHEET 3y 16 INVENTOR Hermann l'f'a @Nimaia srarfns rarnivr ortica.

HERMANN OTTO, OF POTSDAM, GERMANY.

QUICK-Flame GUN.

To all whomr "it may concern.'

Be it known that LHERMANN OTTO, asubject of the German Emperor, residing at Potsdam, Germany, have invented certain new and useful Improvements in Quick-Firing Guns, of which the following is a specification.

The subject of my invention is a quickfiring gun of that class in which all the devices which coperate to enable the gun to be rapidly loaded and fired mechanically are actu'ated off a main shaft driven by hand or power.

My invention differs from prior guns of this type, in that while the projectiles are being fed by means of the main shaft to the intermittently rotating loading drum and to the barrel, the latter moves periodically backward and forward, in such manner that on adjusting the loading drum and firing the gun, the breech is locked, while during feeding of the projectiles the breech is unlocked and the loading drum released in order that it may be partially rotated.

One form of construction of my invention is illustrated in the accompanying drawings, in which- Figure 1 is a side elevation, Fig. 2 a longitudinal section, and Fig. 3 a section on the line 3 3 of Fig. 1. Figs. 4-6 show details to be hereinafter referred to.

The barrel Z is mounted with capability of sliding in the cheeks a, carried by the supports b c'. It is furnished below with a pin m which engages in a cam groove n of the shaft cl. The latter can be rotated either by a crank handle p or by a driving pulley o and belt gear. The loading drum e rotates loosely on the shaft (l and is rovided with a suitable number of proj ecti e chambers f, eight such chambers being provided in the particular gun illustrated. The shaft d has a second cam groove 2 in which there engages the pin 3 of the feed plunger 1, which slides horizontally in the channel z. The cartridges in combustible envelops and the projectiles 8 are fed into the passage 5 down an inclined plane 4. The back of each rojectile chamberf is closed by the rear wa l of the loading drum e. The strikers g, located in this wall of the drum, centrally of the chambers j; on the breech being locked, are closed in well-known manner by the hammer of the double armed lever 6, pivoted at 11 to the bridge 10, and cocked by the cam 7, 16. 12, 13 are the springs actuating the Specification of Letters Patent.

Application filed December 17, 1907.

Patented May 26, 1908.

Serial No. 406,893.

hammer against the strikers g. At each revolution of the shaft d the drum e is rotated through the distance between two chambers f. This is effected by means of the eccentric Q, whose strap is connected with the framing r, the arm s of which on rotation of the shaft d strikes one of the studs t projecting from the back wall of the drum e and advances the latter, which has meanwhile been released by its locking device.

The drum locking device consists of the arm w actuated by the cam fu. The top of this arm is horizontally bent and furnished with a pin u adapted to drop into the depressions y on the periphery of the drum. The number of these depressions corresponds with the number of chambers f provided. To effect a gas-tight oint between barrel and drum, each cartridge chamber `fis surrounded by a groove i to receive a salient ring l@ on the face of the breech end of the barrel.

- The relative location of the cam groove n and the cam disk o is such that when the breech is locked by the ring 7C entering a groove i, the pin u is held in engagement with the corresponding depression y. The thus locked parts are disengaged as soon as the barrel Z slides in the cheeks a, whereby the ring k is retracted from the groove t'.

On rotation of the shaft d, herefore, after discharge of the gun, the breech and the drum e will both be unlocked. For the projection m will be advanced by the proper part of the cam groove n, so that the barrel shifts longitudinally and thus retracts the ring k from the groove i; and likewise the rod fw will be lifted by the cam t so that the pin u leaves the de ression y.

The drum e wi now be rotated by the arm s striking one of the studs t. Tt will be released by this arm as soon as the succeeding cartridge chamber f has come into alinement with the bore of the barrel Z. The barrel Z will now receive a backward motion and the ring k will again enter a groove i. At the same time the pin u will be lifted and drops into the depression y now below it, so that the breech is re-locked.

Meanwhile the plunger 1 will have been so actuated by the cam groove 2 and pin 3 that after the drum e has been locked, a new projectile 8 will be fed into that chamber f which has been adjusted in alinement with the passage 5. On unlocking of the drum e for further rotation the plunger 1 recedes from the passage 5, so that the latter can be supplied with a new projectile 8, which in its turn is duly fed into the chamber Having thus described my invention, what I claim as new and desire to secure by Letters Patent is- 1. In a quick-firing gun, the combination of a base or support carrying cheeks, a barrel slidably mounted. in the cheeks, a shaft mounted in the base parallel with the barrel, a grooved cam on the shaft, and a projection on the barrel engaging in the groove of the cam.

In a quick-firing gun, the combination of a base or support carrying cheeks, a barrel slidably mounted in the cheeks, a shaft mounted in the base parallel with the barrel, a loading drum rotatably mounted on the shaft, means actuated by the rotation of the shaft for longitudinally sliding the barrel and means for rotating the drum step by step.

3. In a quick-firing gun, the combination of a slidably mounted barrel, a shaft parallel therewith, a loading drum rotatably mounted on the shaft, a cam on the shaft for sliding the barrel, a lever engaging the loading drum, and an eccentric on the shaft for actuating the lever to cause a step by step rotation of the drum.

4. In a quick-firing gun, the combination of a slidably mounted barrel, a shaft parallel therewith, a loading drum rotatably mounted on the shaft, a cam on the shaft for slid ing the barrel, a lever engaging the loading drum, an eccentric on the shaft for actuating the lever to cause a step by step rotation of the drum, a locking pin, and a second cam on the shaft to actuate the locking pin to lock and release the drum once between each step by step rotation of the drum.

5. In a quicl-'ring gun, the combination of a barrel, a shaft parallel therewith, a loading plunger also parallel with the barrel, a loading drum rotatably mounted on the shaft, a cam on the shaft for sliding the barrel longitudinally, an eccentric on the shaft, a lever actuated by the eccentric to rotate the drum step by step, and a cam on the shaft to actuate the plunger toload the drum.

6. In a quick-firing gun, the combination f of a shaft, a barrel and a loading plunger parallel with each other, a loading drum rotatablymounted on the shaft, means carried and actuated by the shaft for longitudinally sliding the barrel and plunger, means for rol. 

